feat: add kependudukan seeders, API routes, year filter, and navbar menu

- Add Prisma models: DataBanjar, DistribusiAgama, DistribusiUmur, MigrasiPenduduk, DinamikaPenduduk
- Create seeders for all kependudukan models with year 2026 data
- Register Kependudukan API routes in route.ts
- Update API findMany endpoints to make tahun parameter optional
- Add YearFilter reusable component for admin pages
- Update 4 kependudukan admin pages with year filter UI
- Fix Mantine color array in AdminThemeProvider (add 10th element)
- Fix invalid Mantine color scale in paguTable.tsx (gray.50 -> gray.1)
- Add Kependudukan menu to navbar-list-menu.ts
- Fix Bun JSON import resolution with loadJsonData helper
- Update 74 seeder files to use dynamic JSON loading

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

prisma/data/kependudukan/distribusi-umur/distribusi-umur.json

@@ -0,0 +1,32 @@
+[
+  {
+    "id": "cmk-umur-001",
+    "kelompok": "0-14",
+    "jumlah": 820,
+    "tahun": 2026
+  },
+  {
+    "id": "cmk-umur-002",
+    "kelompok": "15-24",
+    "jumlah": 650,
+    "tahun": 2026
+  },
+  {
+    "id": "cmk-umur-003",
+    "kelompok": "25-54",
+    "jumlah": 1680,
+    "tahun": 2026
+  },
+  {
+    "id": "cmk-umur-004",
+    "kelompok": "55-64",
+    "jumlah": 520,
+    "tahun": 2026
+  },
+  {
+    "id": "cmk-umur-005",
+    "kelompok": "65+",
+    "jumlah": 545,
+    "tahun": 2026
+  }
+]